Re: [PATCH 1/3] usb: gadget: f_fs: Initialize epfile->in early to fix endpoint direction checks

[Greg KH]

On Sun, Jun 14, 2026 at 06:10:00PM +0000, Neill Kapron wrote:
> When parsing endpoint descriptors, ffs_data_got_descs() generates the
> eps_addrmap which contains the endpoint direction. However, epfile->in
> was previously only populated in ffs_func_eps_enable() which executes
> upon USB host connection. As a result, early userspace ioctls like
> FUNCTIONFS_DMABUF_ATTACH that run before the host connects would see
> epfile->in as 0, leading to incorrect DMA directions.
> 
> By moving the initialization to ffs_epfiles_create(), epfile->in is
> accurate before userspace opens the endpoint files.
> 
> Fixes: 7b07a2a7ca02 ("usb: gadget: functionfs: Add DMABUF import interface")
> Assisted-by: Antigravity:gemini-3.1-pro
> Signed-off-by: Neill Kapron <nkapron@xxxxxxxxxx>
> ---
>  drivers/usb/gadget/function/f_fs.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

This should also go to stable, right?

thanks,

greg k-h